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Fuel Injector O-Rings

Discussion in '1st Gen Tundras (2000-2006)' started by bfunke, Aug 6, 2025.

  1. Aug 6, 2025 at 10:53 AM
    #1
    bfunke

    bfunke [OP] Tundra Curmudgeon

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    Bryan
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    Quick question for the fuel injection gurus. Noticed one of my o-rings is split so I'm going to replace them all while I have the manifold off. Is this a part that should only be OEM or are aftermarket o-rings like FelPro acceptable?

    Part numbers for 2000 4.7L:

    23291-41010 Insulator, Vibration

    90480-13005 Grommet

    90301-07024 O-ring
     
    Last edited: Aug 6, 2025
  2. Aug 6, 2025 at 11:16 AM
    #2
    shifty`

    shifty` Earth acid cleanses me, cleanses me clean

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    If Fel-Pro was half as much, I'd probably go for it. If the price is comparable, I'd stick with OEM. But then again, that's my M.O. with most things...
     
    bfunke[OP] likes this.
  3. Aug 9, 2025 at 9:33 AM
    #3
    bfunke

    bfunke [OP] Tundra Curmudgeon

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    23291-41010 Insulator, Vibration $5.83 x 8

    90480-13005 Grommet

    90301-07024 O-ring
     
  4. Aug 9, 2025 at 9:35 AM
    #4
    bfunke

    bfunke [OP] Tundra Curmudgeon

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    Dealer wanted $9.80 when TP online was 5.83 for one insulator. Anyway got them all installed and fuel rail torqued. Now for the rest of the job
     
  5. Aug 9, 2025 at 9:35 AM
    #5
    bfunke

    bfunke [OP] Tundra Curmudgeon

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    upload_2025-8-9_12-34-58.jpg
    Installed new seals on the injectors and torqued the fuel rails
     
    shifty` and Upshot Knothole like this.
  6. Aug 9, 2025 at 1:50 PM
    #6
    TnPlowboy

    TnPlowboy New Member

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    Bryan...Did you clean them up good while you were at it? I'm curious as what the refurbishing outfits actually do to them other than cleaning and replacing the parts that you did or is there more to it? Not sure what cleaning product is...maybe you or someone else does.

    I believe from the postings here that they test the nozzle spray and generate a report. Other than resistance testing the FI injector male connector to determine if they are in spec, is there anything else to do?
     
    Last edited: Aug 9, 2025
  7. Aug 9, 2025 at 4:35 PM
    #7
    bfunke

    bfunke [OP] Tundra Curmudgeon

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    @TnPlowboy - I only replaced insulators, grommets and o-rings. I already had the intake off for a starter replacement and noticed several split grommets so it was an easy fix. I removed the fuel rails and pulled out all the injectors. I cleaned them with throttle body cleaner and replaced the rubber parts. They have a tiny micro screen filter in the top. I think you can get a kit that has replacement filters but mine looked clean when examined with a magnifying glass. I also used a Qtip to apply some contact grease to the electrical connectors as it looked like there was a small amount of white residue inside the connectors. I didn’t repin any injector connectors but that is a future project because the gray plastic wire sleeves are dry and brittle with much having disappeared. Not sure if I want to just use a split sleeve or replace the OEM type. I’ve seen that type of sleeving at some vintage motorcycle restoration sites.
     
    TnPlowboy likes this.

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